Door lock



July 31, 1962 N. A. WELCH 3,047,323

DOOR LOCK Filed March 4, 1957 3 Sheets-Sheet 1 Hill M INVENTOR.

Mc/mms 19. We'll cw HTTOENEY.

N. A. WELCH July 31, 1962 DOOR LOCK 3 Sheets-Sheet 2 Filed March 4, 1957IN V EN TOR.

Momma H. Wm 0/1 HTTOFPNEY.

July-31, 1962 Filed March 4, 1957 IHI N. A. WELCH DOOR LOCK 5Sheeis-Shee; 3

FTTOPNEY.

United States Patent 3,047,323 DOOR LOCK Nicholas A. Welch, WestHartford, Conn., assignor to The American Hardware Corporation, NewBritain, Conn., a corporation of Connecticut Filed Mar. 4, 1957, Ser.No. 643,568 13 Claims. (Cl. 292245) This invention relates to a doorlock and more particularly to a lock which is especially intended foruse on thin doors.

The primary object of the present invention is to provide a lock for usein the narrow, extruded aluminum frames of glass doors which are sofrequently used today on modernistic store fronts and the like.

A further object of the invention is to provide a lock of the above typewhich can be used on doors of either hand.

A still further object of the invention is to provide a lock mechanismwhich can be incorporated in a narrow casing that may be readily mountedin the tubular frames :of said glass doors.

Further objects and advantages of this invention will be more clearlyunderstood from the following description and the accompanying drawingsin which:

FIG. 1 is a sectional plan view, on line 1-1 of FIG.

.3, showing my improved lock as installed in a tubular central verticalsection.

FIG. 7 is a rear view thereof. FIG. 8 is a rear view of the latch unitused in said lock.

FIG. 9 is a similar view of the latch unit showing the same assembledfor use in reversed position.

FIG. 10 is an elevational view of the rollback unit .used in the lock.

FIG. 11 is a sectional side view thereof.

FIG. 12 is an exploded isometric view of someof the parts included inthe latch bolt unit.

FIG. 13 is a fragmentary side view of the lock with the latch bolt indogged posit-ion; parts being broken away to show the constructionthereof.

FIG. 14 is a sectional side view showing the latch unit in retractedposition.

FIG. 15 is a similar view showing the latch bolt unit in projectedposition.

In the embodiment of the invention illustrated in the drawings, myimproved lock includes a casing 5 which is preferably cut to properlength from an extruded bar of metal such as aluminum; the said casingbeing tubular in construction with an opening 6 therein in which thelock mechanism is contained.

The said mechanism includes a latch unit 7 having a latch bolt 8 that isslidable within the opening 6 in the casing between shoulders 9--9, onthe opposite side walls of the casing, and an auxiliary bolt 10 which isslidable within said opening between the latch bolt and the lower wall11 of said opening. Upon the bolt 8 there is mounted a dogging member 12which is pivotally connected to the bolt by a stud 13 that is insertableinto an opening -14 in the bolt. The said dogging member 12 has fingers1515 extending perpendicularly from the tions.

opposite sides of the main body thereof into notches 1616 that extendacross the opposite edges of the bolt. A dogging detent 17 extendsperpendicularly from said main body into one of a pair of slots 18 whichextend through the opposite Walls of the casing. Each of said slots 18has an abutment 19 in the lower side thereof which is adapted to beengaged by the detent 17 when the dogging member is moved about itspivot under the influence of a spring 20 whichis contained within thenotch 16 at the lower side of the latch bolt 8 and between the finger 15of the dogging member, that extends into said notch, and the oppositewall of the notch.

The auxiliary bolt 10 carries a pin 22 which projects from the sidethereof adjacent to the bolt 8 and is movable through the respective oneof a pair of longitudinally extending notches 2323 in the opposite edgesof. the bolt 8 into engagement with the opposite side of the said finger15. The said auxiliary bolt is urged toward normal position, in which itis in register with the latch bolt 8, by means of a spring 24 which isanchored against a backing plate 25 on the casing and is stronger thanthe spring 20 so that the dogging member is normally retained in theposition shown in FIG. 6. The bolt -8 is biased into its normalposition, in which it is projected from the casing, by means of a spring26 which is also anchored upon the plate 25. i

The said latch bolt unit is movable into unlatched or retracted positionby means of an operating lever 27 which is pivoted on a pin 28 thatextends through the opposite walls of the casing. Said lever projectsdownwardly into the notch 16 at the upper edge of the latch bolt 8 andis disposed between the finger 15 therein and the opposite wall of thesaid notch 16. The said operating lever is actuated by an operatingmember 29 which is also pivoted on the pin 28 and is normally urged in aclockwise direction, as viewed in FIG. 6, by means of a torsion spring30.

The operating member 29 is actuated by an operating handle 31 having ashank 32 which extends through ice and is rotatable in an opening 32-0in a cylinder 33 that is secured to the inner Wall of the casing. Thesaid shank 32 has secured to the inner end thereof a rollback 34 havinga projection 35v which engages the adjacent side 'of the opena-tingmember 29 for rotating said member and thereby operatingthe lever 27. p

The said operating member 29 is adapted to move the operating lever.27to retract the latch bolt, but said lever 'is movable in the samedirection independently l of'tlie pin 37 that extends from the cylinder33 and locates the said rollback and the handle 31 in their normal posi-The said rollback also has a notch 38 therein which is adapted toreceive the stop pinv 37 for the purpose to be hereinafter described.

Upon the outer wall of the. casing 5 there is mounted a cylinder lock 39of a conventional type which is threaded into an opening in said walland has a suitable key-operated plug 40 extending therethrough. Thisplug has secured to its inner end an operating lever 41 which is adaptedto engage the finger 15 at the upper side of the dogging member 12 andretract the latch bolt unit.

In order to retain the latch bolt unit in retracted position, as shownin FIG. 1-4, there is provided a holdback member 42 having opposed sideportions 43-43 which are pivoted to the casing by means of studs 44-44which extend into coaxial holes 45 in the opposite walls thereof. Thesaid side portions of the holdback member are connected by an integralcrossbar portion 46 which extends across the rear of the casing and ismovable within notches 47-47 in the said walls of said casing. Adjacentto said crossbar portion of the holdback member, there is provided aprojection 48 which preferably extends inwardly from at least one of thesides 43 of the said member and is adapted to engage one of a pair ofabutments 49-49 at the rear of the latch bolt.

At the front end of the said holdback member there are provided upwardlyextending portions 50-50 having therebetween a roller 51 which extendsthrough opposed notches 52-52 in the opposite side walls of the casing.The said roller 51 and the crossbar 46 are adapted to be engaged by thekey-controlled operating lever 41, as clearly illustrated in FIGS. 14and 15, for a purpose to be also hereinafter described.

The front of the casing is closed by means of a face plate 53 whichextends across the opening 6 in said casing and has an opening 54therein through which are slidable the latch bolt 8 and the auxiliarybolt 10; the said plate being secured to the casing by means of screws55-55 which are threaded into holes 56-56 that extend through theopposite end portions of the casing, as clearly illustrated in FIG. 6.

The operation of my improved lock, when in its normal positionillustrated in FIGS. 1 to 7, is as follows: When it is desired toretract the latch bolt unit, the operating handle 31 is rotated in aclockwise direction, as seen in FIG. 6, so that it will rotate therollback 34 therewith and thereby rotate the operating member 29 and theoperating lever 27 in a counterclockwise direction. The said operatinglever 27 will then engage the respective finger of the dogging memberand move the latch bolt 8 into retracted position against the force ofthe spring 26. During the said movement of the bolt, the detent 17 ofthe dogging member will engage and slide along the upper side of therespective slot 18 in the wall of the casing. Engagement of the pin 22of the auxiliary bolt with the finger 15 at the lower side of thedogging member will also cause the said auxiliary bolt to be retractedwith the latch bolt against the force of the spring 24.

Release of the operating handle 31 will cause the latch bolt unit to beprojected to its latching position and the operating lever 27 and member29 to be returned to their normal positions by the respective springs24, 26 and 30.

As shown in FIG. 13, when the latch bolt is in latching position, withthe door closed and the latch bolt extending into the recess of aconventional strike, which strike is not shown, the auxiliary bolt 10 isin engagement with the outer surface of said strike and is therebyprevented from moving into its fully projected position. Therefore, thepin 22 on the auxiliary bolt will remain away from the respective finger15 of the dogging member 12 and thus allow the spring to swing the saiddogging member into dogging position wherein the detent 17 thereof iscarried into engagement with the respective abutment 19 and therebysecures the latch bolt against being forced from its door-latchingposition into unlatching position while the door is closed.

When it is desired to secure the latch bolt unit in retracted position,this may be done by first retracting the latch bolt with the operatinghandle 31 and holding said bolt in retracted position. The key plug 40is then rotated, with the proper key, so as to move the operating lever41 into engagement with the crossbar portion 46 of the holdback member42, as shown in FIG. 14. Further rotation of the lever 41 will forcesaid portion 46 downwardly so as to move the projection 48 in front ofthe abutment 49 on the latch bolt, thereby holding the latch bolt unitback in its retracted position.

When the latch bolt is secured in retracted position, as abovedescribed, and it is desired to release the bolt unit so as to allow itto be moved into latching position, the key plug is rotated in theopposite direction, thereby moving the lever 41 into engagement with theroller 51 and rocking the holdback unit on its pivot so as to raise theprojection 48 to disengage it from the abutment 49 and allow the boltunit to be projected into latching position.

As shown in FIG. 15, when the latch bolt is in the latching position andit is desired to open the door from the outside, the lever 41 isrotated, with the key, past the roller 51 and into engagement with thefinger 15 at the upper side of the dogging member. Further turning ofthe key plug will retract the bolt unit to its unlatching position andpermit opening of the door from the out side.

In order to prevent the holdback member from interfering with theretraction of the bolt unit, in the event that said member hasunintentionally, or by mistake, been moved into its holdback position,shown in FIG. 14, while the bolt was in its projected or latchedposition, there is provided upon the bolt 8 a stud 57 which is adaptedto engage a camming projection 58 under the respective side of theholdback member, as the bolt is moved toward retracted position, andthereby rock the holdback member so as to raise the projection 48 out ofthe way of the bolt.

The said holdback member 42 is retained in its operative and inoperativepositions by such retaining means as a projection 59 which is receivedin recesses 60 and 61 that are provided in either one or both sides ofthe casing.

The above described lock is particularly adapted for installation in aglass door having a frame that is constructed of tubular sections, suchas the extruded section indicated at 62. For installation in suchtubular frame sections, the casing of the lock is provided with endportions 63-63 which are adapted to overlap the upper and lower edgeportions 6464 of an opening 65 that is cut in the said section and is ofsuch size that the lock may be inserted therethrough into the interiorof the frame. The casing is secured in the frame by means of jack screws66-66 which are received in the holes 56-56 in the casing and areaccessible from the front thereof. The jack screws are adapted to engagethe rear wall of the door frame and, when tightened, force the casingagainst the inner side of the front wall of the section 62. The casingis retained in position by the face plate 53 which fits within theopening 65 flush with the outer surface of the section 62, all as fullydescribed in the copending application of Nicholas A. Welch, Serial No.644,590, filed March 7, 1957, and now Patent No. 2,919,571, issuedJanuary 5, 1960.

It will also be noted that by providing the slots 18-18 in the oppositewalls of the casing and the notches 16 and 23 in both edges of the latchbolt, it is possible to reverse the latch bolt unit so as to adapt saidlock to right or left hand doors of regular and reverse bevel.

The parts as above described and shown in all of the figures of thedrawing, except FIG. 9, are arranged for a right hand door which opensinwardly, and the latch bolt is therefore operable by the handle 31 fromthe inside of the door; the key operated plug 40 being located at theoutside of the door. When it is desired to use the lock on a door ofreverse bevel, or one that opens outwardly, the latch bolt unit 7 isreversed with respect to the casing so that the bevelled surface 8a ofthe latch bolt 8, the dogging member 12 and the pin 57 will be at theopposite sides of the casing, as shown in FIG. 9. The spring 20 isplaced in the opposite notch 16 and the auxiliary bolt 10 is reversed byfirst pushing the pin 22 therethrough so that it will project from itsopposite side, and then placing said auxiliary bolt below the latch boltand in the same position relatively thereto as clearly shown in FIGS. 6and 8. No other reversal of parts is then necessary since the holdbackmember is operable at either side of the casing by the pin 57 on thelatch bolt, and the pin 22 on the auxiliary bolt will move through therespective slot 23 into engagement with the finger 15 on the respectiveside of the holdback member. The said pin i2 is preferably of thetubular spring type so that it is frictionally retained in projectingposition on the auxiliary bolt and still may be readily pushedtherethrough to project from either side thereof.

When the lock is to be operated by the handle 31 and the key plug 40from the sides opposite to those shown in the drawing, the cylinders 39and 33 may be interchanged since they are threaded to fit in thethreaded openings in either of the side walls of the casing and adaptedto be secured in operative position therein by means of set screws 67-67 As shown in FIG. 10, the rollback 34 may be locked in centralposition, by means of the spring pin 37, so as to permit the cylinder 33to be rotated by the handle 31 for the purpose of turning said cylinderwhen assembling it to the lock casing. After the cylinder has beenassembled to the casing, the said plate may be released by depressingthe pin 37 against the tension of its spring 37-11.

I claim:

1. In a door lock, a casing having spaced sidewalls defining an openingtherein, a latchbolt reversibly mounted in said opening for movementparallel to said sidewalls between a retracted position within saidopening and a projected position extending from said opening, saidlatchbolt having a bevelled camming face at its outer end, means fordogging said latchbolt when said bolt is in projected position, saidmeans including a dogging member pivotally mounted on said latchbolt formovement between dogging and undogging positions, the pivotal axis ofsaid dogging member being normal to the longitudinal axis of said boltand located at substantially the midpoint between the upper and loweredges of said bolt, said dogging member having finger portions extendingoutwardly from the said pivotal axis, said fingers having contactsurfaces which are substantially equidistant from said pivotal axis anddisposed in substantial alignment along a line normal to thelongitudinal axis of said latchbolt, said dogging member further havingdetent portions spaced outwardly a substantially equal distance fromsaid pivotal axis and from a line through said pivotal axis extendingnormal to a line through said contact surfaces, and means on said casingin the form of an abutment engageable by one of said detent portionswhen said dogging means is rocked about said pivotal axis whether saidlatchbolt has been selectively inserted in said casing in inverse rightand left hand positions to properly locate said camming face for a rightor left hand door, spring means selectively positionable between saiddogging member and said latchbolt to bias said dogging member towarddogging position in either selected position of said latchbolt, andoperating means coacting with one of said contact surfaces on saidfinger portions in either selected reversed position of said latchboltto move said dogging member out of dogging position and to retract saidlatchbolt.

2. In a door lock, a casing having spaced sidewalls defining an openingtherein, a latchbolt reversibly mounted in said opening for movementparallel to said sidewalls between a retracted position within saidopening and a projected position extending from said opening, saidlatchbolt having a bevelled camming face at its outer end, means fordogging said latchbolt when said latchbolt is in projected position,said means including a dogging member pivotally mounted on saidlatchbolt for movement between dogging and undogging positions, thepivotal axis of said dogging member being normal to the longitudinalaxis of said bolt and located at substantially the midpoint between theupper and lower edges of said bolt, said dogging member having fingerportions extending outwardly from the said pivotal axis, said fingershaving contact surfaces which are substantially equidistant from saidpivotal axis and which are disposed in substantial alignment along aline normal to the longitudinal axis of said latchbolt, said doggingmember further having detent portions spaced outwardly a substantiallyequal distance from said pivotal axis and from a line through saidpivotal axis extending normal to the plane containing said contactsurfaces, and means on said casing in the form of an abutment engageableby one of said detent portions when said dogging means is rocked aboutsaid pivotal axis whether said latchbolt has been selectively insertedin said casing in inverse right and left hand positions to properlylocate said camming face for a right or left hand door, spring meansselectively positionable between said dogging member and said latchboltto bias said dogging member toward dogging position in either selectedposition of said latchbolt, an auxiliary bolt mounted in said casing formovement parallel to said latchbolt between a depressed position Withinsaid opening and a projected position extending from said opening, saidauxiliary bolt having a bevelled camming face at its outer end disposedsimilarly to the bevelled camming face on said latchbolt, a projectingpart on said auxiliary bolt coacting with one of the finger portions ofsaid dogging member to retain said dogging member out of doggingposition when said auxiliary bolt is projected and enabling movement ofsaid dogging member to dogging position under the influence of saidspring means when said auxiliary bolt is depressed, and operating meansmounted on said casing coacting with the contact surface of the other ofsaid finger portions in either selected reversed position of saidlatchbolt to move said dogging member out of dogging position and toretract said latchbolt.

3. The subject matter as set forth in claim 2 wherein said auxiliarybolt is also insertable into said opening in inverse right and left handpositions and said projecting part is connectable thereto in reversedprojecting positions for coaction with the finger portion on saiddogging member adjacent said auxiliary bolt in either selected positionof said latchbolt.

ft. In a door lock, a casing having spaced sidewalls defining an openingtherein, a latchbolt reversibly mounted in said opening for movementparallel to said sidewalls between a retracted position within saidopening and a projected position extending from said opening, saidl-atchbolt having a bevelled camming face at its outer end, means fordogging said latchbolt when said latchbolt is in projected position,said means including a dogging member pivotally mounted on the side ofsaid latch bolt for movement between dogging and undogging positions,the the pivot axis of said dogging merrrber being located atsubstantially the midpoint between the upper and lower edges of saidbolt, said dogging member having portions extending outwardly from thesaid pivotal axis, each portion having contact fingers substantiallyequidistant from said pivotal axis and extending transversely of thelongitu dlnal axis of said bolt, said fingers being in substantialalignment along a line normal to the longitudinal axis of said bolt,said dogging member further having detent portions spaced outwardly asubstantially equal distance from said pivotal axis and from a linethrough said pivotal axis extending norm-a1 to a line through saidcontact fingers, and means on opposite sides of said casing in the formof abutrnents selectively engageable by one of said detent portions whensaid dogging means is rocked about said pivotal axis whether saidlatchbolt has been selectively inserted in said casing in inverse rightand left hand positions to properly locate said camming face for a rightor left hand door, spring means selectively positionable between saiddogging member and said latchbolt to bias said dogging member towarddogging position in either selected position of said latchbolt, andoperating means coacting with one of said contact fingers in eitherselected reversed position of said latchbolt to move said dogging memberout of dogging position and to retract said latchbolt.

5. In a door lock, a casing, a latch bolt slidable in said casingbetween projected and retracted positions and spring pressed intoprojected position, an operating lever mounted upon said casing forrotation in opposite directions and having a free end portion engageablewith and adapted to retract said latch -bolt, an abutment on said latchbolt, a latch bolt holdback member pivotally mounted intermediate itsends upon said casing for rocking movement into and out of holdbackposition and having a projection thereon which, when the latch bolt isin retracted position and the holdback member is in holdback position,is disposed in the path of said abutment thereby preventing projectionof said latch bolt, said holdback member having transverse portions atopposite sides of its pivotal connection engageable by the free end ofsaid operating lever whereby, when said lever is rotated in onedirection it engages one of said portions and rocks said holdback memberinto holdback position and when rotated in the opposite direction itengages the other of said portions and rocks said holdback member out ofholdback position.

6. The subject matter of claim wherein said other transverse portion ofthe holdback member is normally disposed out of the path of saidoperating lever and is lo. cated in its path only when the holdbackmember is disposed in holdback position.

7. The subject matter of claim 5 wherein said transverse portions of theholdback member extend across the casing and are thus engageable by theoperating lever when located at either side of the casing.

8. A lock as set forth in claim 5 wherein the holdback member has a camportion and the latch bolt has a projection thereon engageable with saidcam portion for moving the holdback member out of holdback position asthe latch bolt is moved toward retracted position.

9. A lock as set forth in claim 5 wherein the holdback member has a camportion at opposite sides of the casing engageable with a projection onthe adjacent side of the latch bolt when the latch bolt is in differentpositions within the casing and the said projection is disposed ateither side of the casing.

10. In a door lock, a casing having side walls defining an openingtherein, a latch bolt slidable in said opening between projected andretracted positions and spring pressed into projected position, anoperating lever mounted upon one of said side walls for rotation inopposite directions and having a free end portion engageable with andadapted to retract said latch bolt, an abutment on said latch bolt, alatch bolt holdback mem ber including side portions extending along theouter sides of said side walls and pivotally mounted intermediate theirends on said side walls whereby said holdback member is adapted forrocking movement into and out of holdback position, a projection on atleast one of said side portions movable into the path of said abutmentwhen the latch bolt is retracted and the holdback member is in holdbackposition whereby movement of the latch bolt to projected position isprevented, crossbars extending between the opposite ends of said sideportions and transversely across the opening in said casing, saidcrossbars being engageable by the free end of said operating leverwhereby, when said lever is rotated in one direction it engages one ofsaid crossbars and rocks the holdback member into holdback position andwhen rotated in the opposite direction it engages the other of saidcrossbars and rocks said holdback member out of holdback position.

11. The subject matter set forth in claim 10 wherein at least one of theside portions of said holdback member is provided with a cam surface andsaid latch bolt is provided with a pin adapted to engage said camsurface upon retraction of said latch bolt to thereby move said holdbackmember out of holdback position.

12. A door lock including a casing having an opening therethrough, abolt slidable in said opening between pro. jected and retractedpositions, an operating lever for moving said bolt to retractedposition, a supporting cylinder threaded into a hole in a side wall ofsaid casing and extending into the opening therein, an operating handlehaving a shank rotatably mounted in said cylinder and extendingtherethrough, a rollback member secured to the inner end of said shank,means connecting said rollback with the operating lever, a stop pinmovably mounted in said cylinder and normally positioned for engagementby said rollback for locating the operating handle in normal position,spring means for yieldingly urging said rollback into engagement withsaid stop pin, and an abutment on said rollback engageable with saidstop pin for securing the rollback to the cylinder in a position whereinit is located within the periphery of the cylinder to permit entry ofsaid cylinder into the hole in the side wall of the casing.

13. A door lock including a casing, a latch bolt slidable in said casingbetween projected and retracted positions, an operating lever rotatablymounted on said casing and having a connection with said latch boltwhereby depression of said bolt results in movement of said operatinglever, an operating member rotatably carried by said casing foractuating said operating lever, means providing a lost motion connectionbetween said operating member and said operating lever permittingindependent movement of said operating lever upon depression of saidlatch bolt, a rollback rotatably carried by the casing for rotating saidoperating member to thereby actaute said operating lever and retractsaid latch bolt, a handle for rotating said rollback, a stop pinengageable by said rollback for locating the said handle in normalposition, and spring means for yieldingly urging said operating memberinto contact with the rollback and the rollback into contact with saidstop pin.

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